Side control escape inside arm preference

Wondering what the higher level fellas find more effective in terms of escaping.

Imagine being in someone's side control whereby they are lying across your left hand side (so their legs would be near your left arm, their head would be closer to your right arm). In terms of escaping, is it better to use one's left (i.e. inside) arm on the hip like so:http://youtu.be/Hr86GYFrPvc?t=5m5s